Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Basic and Diluted Net Income (Loss) Per Share

The calculations of basic and diluted net income per share are as follows:



	Three months ended September 30,
	2014		2013
Net income - basic	$	79,720	$	141,306
Effective of dilutive securities:
Convertible senior notes - interest expense related to contractual coupon interest rate and amortization of discount and note issuance costs	2,803		4,678
Net income - diluted	$	82,523	$	145,984

(Shares in thousands)
Weighted average shares - basic	100,796		98,226
Effect of dilutive securities:
Stock options	9,377		10,379
Restricted stock	430		462
Convertible senior notes	4,033		4,761
Warrants	2,787		2,885
Dilutive potential shares	16,627		18,487
Weighted average shares - diluted	117,423		116,713

Net income per share - basic	$	0.79	$	1.44
Net income per share - diluted	$	0.70	$	1.25



	Nine months ended September 30,
	2014		2013
Net income - basic	$	237,898	$	327,556
Effective of dilutive securities:
Convertible senior notes - interest expense related to contractual coupon interest rate and amortization of discount and note issuance costs	—		13,857
Net income - diluted	$	237,898	$	341,413

(Shares in thousands)
Weighted average shares - basic	100,325		97,602
Effect of dilutive securities:
Stock options	9,515		10,220
Restricted stock	413		415
Convertible senior notes	—		4,761
Warrants	2,950		2,556
Dilutive potential shares	12,878		17,952
Weighted average shares - diluted	113,203		115,554

Net income per share - basic	$	2.37	$	3.36
Net income per share - diluted	$	2.10	$	2.95

Antidilutive Securities

Shares which have been excluded from the September 30, 2014 and 2013 diluted per share amounts because their effect would have been antidilutive include the following:

Three months ended September 30,

(Shares in thousands)

Stock options